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• Synthesis

  A solution of bromine (7.2 g, 2 mL, 40 mmol) in 47 mL glacial acetic acid was added dropwise to sodium 2-aminobenzoate (6.4 g, 40 mmol) in 32 mL of glacial acetic acid  at 15 °С and the mixture was stirred for 1 h at the same temperature. The product  was filtered off, washed with benzene and dried in the dark. The bromobenzoic acids  containing mixture (0.5 g) was added to 10 mL of boiling water followed by the  addition of 1.3 mL of concentrated hydrochloric acid and hot filtration under vacuum.  The insoluble material contained 2-amino-3,5-dibromobenzoic acid, whereas 2- amino-5-bromobenzoic acid precipitated upon cooling of the filtrate. IR (suspension in nujol, cm−1 ): 3469, 3364,  1682, 1600, 1564, 1538, 1454, 1421, 1378, 1328, 1307, 1226, 1063, 902, 882, 790,  711, 691, 591, 543.;

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